Unable to access Swift 4 class from Objective-C: “Property not found on object of type”

Question

Using the latest Xcode 9 beta, I\'m seemingly completely unable to access properties on Swift classes. Even odder, I can access the class itself to instantiate it or whateve

Answer 1

As for Swift 5.1 I found that "@objc" is not enough, but also make it public "@objc public":

@objc public class SomeClass: NSObject {
    @objc public let amount: NSNumber
...